A5031061637- Laser-Matter Interactions and Applications
- Spectroscopy and Quantum Chemical Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Terahertz technology and applications
- Photochemistry and Electron Transfer Studies
- Mass Spectrometry Techniques and Applications
- Advanced Fiber Laser Technologies
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Quantum Dots Synthesis And Properties
- Quantum Information and Cryptography
- Atmospheric Ozone and Climate
- Free Radicals and Antioxidants
- Physics of Superconductivity and Magnetism
- Chalcogenide Semiconductor Thin Films
- Atomic and Molecular Physics
- Particle physics theoretical and experimental studies
- Perovskite Materials and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Gold and Silver Nanoparticles Synthesis and Applications
Dalian University of Technology
2015-2024
Dalian Institute of Chemical Physics
1998-2021
Chinese Academy of Sciences
1992-2021
Dalian University
2009-2019
Dalian Jiaotong University
2016
State Key Laboratory of Molecular Reaction Dynamics
2003-2013
Liaoning Shihua University
1994
Academia Sinica
1992
China Center of Advanced Science and Technology
1992
Theoretical studies of the dynamics abstraction reaction, H' + HBr (v=0,j=0) --> H'H Br, have been performed with quasiclassical trajectory method (QCT) on a new ab initio potential energy surface (Y. Kurosaki and T. Takayanagi, private communication). The calculated QCT cross sections are in good agreement earlier quantum wave packet results over most collision range from 0.1 to 2.6 eV, state-resolved rotational distributions product molecule quantitatively consistent experimental results....
We demonstrate theoretically an efficient field-free orientation in LiH and LiCl driven by available terahertz few-cycle pulses (TFCPs). Exact results numerically solving the time-dependent Schrödinger equation including vibrational rotational degrees of freedom are compared to rigid-rotor approximation (RRA) as well impulsive (IA), effect rotational-vibrational coupling on both RRA IA is examined detail. find that current TFCPs may overcome technical limitation half-cycle pulse for...
The diabatic photodissociation and photoionization processes of the NaI molecule are studied theoretically using quantum wave packet method. A pump laser pulse is used to prepare a dissociation that propagates through both ionic channel (NaI→Na++I−) covalent (NaI→Na+I). Stark control dynamics probe employed ionize products from two channels. Based on first order nonresonant nonperturbative dynamic effect, probabilities branching ratio channels can be controlled. Moreover final photoelectron...
We explore theoretically the rovibrational dynamics of stimulated Raman adiabatic passage (STIRAP) in molecular electronic states including both rotational and vibrational degrees freedom, with LiH molecule as an example. By using a pure state initial state, we find that, under condition two-photon resonance, efficient population transfer can be achieved via STIRAP desired target selected by adjusting laser-pulse parameters. Besides interested states, however, some unwanted may affect...
In this study, we prepared Au nanospheres (NSs)@Ag nanorods (NRs) for colorimetric monitoring of hypochlorite (ClO–). The sensing strategy is based on the redox reaction between Ag and ClO–, which gives rise to decrease in aspect ratio a more than 180 nm blue-shift longitudinal localized surface plasmon resonance (LSPR) peak NSs@Ag NRs. Meanwhile, visible color change from yellow green, blue, purple, red was observed, could be utilized qualitative determination ClO– by naked eyes. Moreover,...
The molecular dynamics of Autler-Townes (AT) splitting in a multiphoton resonance ionization spectrum is numerically simulated using the time-dependent wave packet method for rotating ${\mathrm{Na}}_{2}$ molecule with linearly polarized laser pulse. Employing Fourier grid and Legendre polynomials as basis functions, initial directly propagated split operator method. Wave simulations demonstrate that AT results from rapid Rabi oscillations induced by an ultrashort intense pulse rovibrational...
The dissociation dynamics of Br2 molecules induced by two femtosecond pump pulses are studied based on the calculation time-dependent quantum wave packet. Perpendicular transition from XΣg+1 to AΠ1u+3 and Π1u+1 parallel BΠ0u+3, involving product channels Br (P3∕22)+Br (P3∕22) (P3∕22)+Br* (P1∕22), respectively, taken into account. Two create dissociating packets interfering with each other. By varying laser parameters, interference can be controlled, probabilities three excited states changed...
We propose a scenario used for controlling molecular orientation with an infrared laser pulse and delayed half-cycle pulse, LiH molecules as example. The excites the in thermally initial state to specific rovibrational state, orients by rotational excitation. Numerical calculation shows that efficient field-free time-dependent can be realized even at room temperatures. feasibility has been analyzed under present experimental conditions.
We present a theoretical scheme used for investigating the formation of ultracold molecules via photoassociation with slowly-turned-on and rapidly-turned-off (STRT) laser pulse, Cs${}_{2}$ as an example. As compared unshaped this kind shaped pulse has prominent advantage by which we can prevent associated from returning to initial scattering state. Numerical calculations show that efficient be realized STRT is available in current experiment optical tool.
The field-free orientation induced by a single-cycle terahertz (THz) laser pulse is studied for two “heavy” molecules, NaI and IBr. Two methods are used compared in the calculations: One to solve exact time-dependent Schrödinger equation (ETDSE) considering full-rovibrational degrees of freedom, other invoke rigid-rotor approximation (RRA). Calculations performed central frequency varying from 0.05 1.0 THz peak intensity taken be 5 × 107, 2 108, 108 W/cm2, respectively. degree orientation,...
The orientation and predissociation dynamics of the NaI molecule are studied by using a time-dependent wavepacket method. is first pre-oriented single-cycle pulse (SCP) in terahertz (THz) region then predissociated femtosecond pump pulse. influence molecular field-free on detail. We calculate radial angular distributions, degrees, populations for both ground excited electronic states. It found that pre-orientation affects distributions significantly, it has weak distributions. By varying...
We present a strategy to achieve carrier-envelope phase-dependent field-free molecular orientation with the use of phase (CEP) stabilization and asymmetric few-cycle terahertz (THz) laser pulses. The calculations are performed on LiH molecule by an exact solution full time-dependent Schr\"odinger equation including both vibrational rotational degrees freedom. Our show that efficient can be obtained even at considerable temperatures. Moreover, we find simple dependence CEP, which implies CEP...
The perturbation theory of stimulated Raman scattering (SRS), with pump on minus off and heterodyne detection along the probe direction, is reviewed. It has four third-order polarization terms, labeled as SRS or inverse (IRS): SRS(I), SRS(II), IRS(I), IRS(II). These polarizations have a wave packet interpretation. polarizations, homogenous inhomogeneous broadening included, can be written integrals over four-time correlation functions, analytic formulas are derived for latter...
Abstract The nanoparticle density (PD) of the substrates is crucial for surface‐enhanced Raman scattering (SERS) performance. Here, bottom‐up SERS based on rough gold nanorods (R‐Au NRs) with different PD are fabricated and their property investigated. In particular, R‐Au NRs deposited Si wafer from sparse to dense through electrostatic interaction monolayer multiple layers by interface self‐assembly technique. It found that intensity increases dramatically increasing remains almost...
The photoassociation (PA) dynamics implemented by a train of asymmetric slowly turned-on and rapidly turned-off (STRT) laser pulses is investigated theoretically with Cs${}_{2}$ as an example. A higher PA efficiency achieved optimizing the parameters STRT pulse train. reaction goes partly beyond scope window. Numerical calculations show that efficient population accumulation in process can be realized laser-pulse which available current experiment based on mode-lock shaping technology.
We show that optimally shaped laser pulses can beneficially influence charge transfer in slow H++D collisions. Time-dependent wave packet optimal control simulations are performed based on a two-state adiabatic Hamiltonian. Optimal is using either an adaptive or fixed target to obtain the desired field. In scheme, state updated according renormalized fragmentary yield exit channel throughout optimization process. normalized outgoing Gaussian located at large internuclear separation. Both...
Antimony selenide (Sb2Se3) is an emerging photovoltaic material. We demonstrate that organic small molecule of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB) can induce the crystallization Sb2Se3 film during annealing treatment. By introducing NPB buffer layer, crystal quality improved, and photogenerated carrier lifetime increased. In addition, introduction layer suppress interface recombination near anode. The solar cell was fabricated using C60 as electron transport by vacuum...
Theoretical studies of the stereodynamics for chemical reaction H + LiH+(v = 0, j 0) → Li++ H2 were conducted using quasi-classical trajectory (QCT) method on three-dimensional potential energy surface [J. Chem. Phys. 119, 11241 (2003)] at three collision energies (0.01, 0.05 and 0.1 eV). The calculated DCS results indicate that products tend to both extreme forward backward scattering. Because well lying in product valley is a weak van der Waals well, forward–backward scattering asymmetric....